Made of highly refined DEG, our ST Series Stem Top Wick chafing fuels will never damage your valuable warming dishes. ST Series fuels utilize a non-flammable formula that is clean and consistent burning, with no harmful byproducts. There is no smoke, soot or smell ? just enjoy the industry leading longest burn times. LeoLight?s Vesta Heat brand of DEG screw top (C Series) and stem top (ST Series) chafing fuels are the industry?s leading user friendly and economical solution for keeping your food warm throughout the duration of your function. Select between 2+ Hour / 4+ Hour / 6+ Hour options.